diff --git a/Dockerfile.web b/Dockerfile.web
index 1c1b60c69..605b088b3 100644
--- a/Dockerfile.web
+++ b/Dockerfile.web
@@ -47,7 +47,7 @@ RUN venv/bin/python -m external_libraries
 # Run the tests
 RUN TEST=true venv/bin/python -m unittest discover
 
-VOLUME ["/conf/stack", "/var/log", "/datastorage"]
+VOLUME ["/conf/stack", "/var/log", "/datastorage", "/tmp"]
 
 EXPOSE 443 80